BECE Past Questions & Answers – 2002 (SCIENCE)

1. Which of the following substances is made up of only one kind of atom?
A. Iron B. Salt C. Steel
D. Water

2. Ice is able to float on water because the ice is
A. colder than water
B. denser than water
C. has a greater mass for the same volume of water
D. has a greater volume for the same mass of water

3. Which of the following statements about the state of matter is correct?
A. Molecules in a solid are disorderly arranged
B. Solids are highly compressible
C. Liquids have definite form and volume
D. Molecules in a gas move faster than those in a liquid.

4. The above diagram illustrates the structure of an atom. The components labeled X and Y are respectively
A. neutrons and shells
B. ions and neutrons
C. neutrons and nucleus

D. nucleus and neutrons

5. The force which opposes the motion of one object on another object is known as
A. friction B. gravity C. tension D. weight

6. When the brakes of a bicycle in motion are applied for a long time the wheels become hot. This is because of a change of energy from
A. kinetic energy to potential energy B. potential energy to kinetic energy C. potential energy to heat energy
D. kinetic energy to heat energy

8. In which of the following situations is work said to be done?
A. Walking with a load on the head in an upright position. B. Getting up from a chair
C. Pushing against a wall which does not move. D. Sitting still behind a desk.

9. The energy stored in food is
A. an electrostatic energy
B. a chemical energy
C. a solar energy
D. a thermal energy

10. A machine which has an energy loss of 10% will have an efficiency of
A. 100%
B. 90%
C. 55%
D. 10%

The figure below shows a simple electric circuit.Use it to answer questions 11 to 13

36. Which of the following habits will help in the control of diseases contracted through air?
I. Not throwing humanwaste into rivers
II. Washing of hands after visiting the toilet
III. Not spitting about in public places
IV. Keeping foods always covered

A. I and II only B. II and III only C. III only
D. I,III and IV only

37. Soup which is not well-heated gets spoilt when kept for sometime because the
A. salt in the soup is too small
B. water in the soup do not all evaporate
C. heat in the soup is not enough to kill all bacteria
D. water condenses back into the soup.

38. The measure of the amount of water vapour in the air is known as
A. cloud
B. dew
C. humidity
D. temperature

39. Which of the following heavenly bodies is a star?
A. Earth B. Moon C. Sun
D. Milky Way

40. The planet in our solar system which has the largest orbit is
A. Jupiter B. Mars C. Pluto D. Venus